It's a puzzle that has bedeviled astronomers and theorists for years: Do massive stars form in the same way as our sun or by some other process?

這是一個困惑了天文學家和理論家多年的謎：巨型恒星跟我們的太陽是以同樣方式形成的嗎久久精品一二三美女？莫非巨型恒星是以其他方式形成的在线国产性爱福利？

Whatever his intentions, the authors say,"it was Khrushchev's propensity to risk war that bedeviled US presidents" and made confrontation inevitable.

不管他的動機如何，作者寫到：&正是赫魯曉夫的那種冒險舉動激怒了美國總統(tǒng)&91在线视频第一页，雙方的沖突變得不可避免伊人久久大香线蕉综合AV。

Often this importation of American words has encountered a linguistic snobbery by the British, which was a manifestation of the cultural snobbery that bedeviled Anglo-American relationships for a long time.

這種美國詞語的輸入常常會遭到英國人語言上的鄙視，這是文化鄙視的一種表現(xiàn)有人有片在线观看视频，正是它長期以來給英美關系添了不少麻煩亚洲视频黄色。

Changing theprogram is amatter ofincrediblecomplexity,and has bedeviled the IOC for years.

改良奧運會比賽項目一直是一個非常復雜，并且困擾國際奧委會多年的難題~级黄色视频高清视频。

Since then, he has periodically upbraided them for ex-pecting government to solve every problem. At times, he seemed to sug-gest that constituents bedeviled by adversity just get over it.

從那時起免费三级视频网站，他時而訓斥選民指望政府解決所有問題，偶爾他似乎自認被經(jīng)濟困境所苦的選民已經(jīng)熬過來了性一级录像视频网站免费大全。

He will lay out benchmarks for the U.S. and Afghan governments to meet on the recruitment and training of Afghan security forces, as well as on the rooting out of corruption that has bedeviled the country.

他將在征招并訓練阿富汗安全部隊欧美综合色婷婷欧美综合五月、杜絕困擾這個國家的腐敗問題這些方面，為美國和阿富汗政府劃定目標一级黄色毛片网站。

Five years ago, with the invasion of Olympic hordes looming, the proprietor and his chefs set out to solve a problem that had long bedeviled duck roasters.

五年前污污视频三级片，由于看到了奧運游客將大舉光臨的前景，大董的老板和廚師們開始潛心解決長期困擾著業(yè)內(nèi)人士的一個難題黄片观看无码在线。

As in California, the need for water conservation is emerging as a more and more acute issue across the country as more evidence emerges linking China's less-than-stellar air quality to the drought that has bedeviled the country's northeastern region.

與美國加州一樣日本黄色一级小视频，節(jié)水正在成為中國各地面臨的一個越來越迫切問題，因為有更多證據(jù)顯示，中國糟糕的空氣質(zhì)量與肆虐中國東北地區(qū)的干旱有關聯(lián)国产在线对白视频黄。

On the plus side, it might move towards the establishment of a global currency system that provided a true store of value, without the incessant inflation that has bedeviled the dollar's reign.

在加法方面18禁美女裸体啪啪免费网站，它可能轉(zhuǎn)向建立一個提供真正價值儲藏的全球貨幣體系，沒有美元體系下的那種不斷的通脹超碰在线欧美精品。

Speakers agreed that voluntary credits remain bedeviled by a confusing array of competing standards.

自愿型碳權(quán)仍在受到混亂不堪的競爭標準的困擾激情黄区1区。